1) Diffusion is ………………process a) Active b) Passive 2) Diffusion can happen in …………and ………… a) Solids and gases b) Liquid and solids c) Gases and liquids 3) Particle move from ……………….concentration to …………… concentration a) Low to low b) High to high c) Low to high d) High to low 4) in diffusion the particles will move until they reach ------------ a) a high level b) a low level c) equilibruim 

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